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对中国特有植物四合木(Tetraena mongolica)植株上昆虫群落进行调查和多样性特征分析,共采得四合木上昆虫标本1935号,隶属于8目42个科(或总科)136种。包括同翅目、膜翅目、半翅目、鞘翅目、双翅目、缨翅目、直翅目和脉翅目的种类。同翅目昆虫在数量上占有绝对的优势,达67.96%。膜翅目丰富度最高,有59种;优势类群(>10%)是叶蝉,常见类群(1%～10%)包括小蜂、粒脉蜡蝉、天牛、蚂蚁、皮蝽、蚜虫和盲蝽等。调查所得昆虫群落中植食性昆虫有59种共1610只,丰富度和个体数量在群落中占有绝对的优势。其中尤以吸食类昆虫为最,其个体数量和优势度指数最大,但均匀度最低。寄生性天敌昆虫在群落中多样性最大,优势度最低,多为膜翅目种类。中性昆虫优势度指数较高。捕食性昆虫物种丰富度和个体数量较小,但多样性高,仅次于寄生性昆虫。
The insect community in Tetraena mongolica, a species endemic to China, was investigated and the diversity characteristics were analyzed. A total of 1935 insect specimens were collected from Tetraena mongolica, belonging to 136 species of 8 families (or superfamilies) of 8 orders. Including Homoptera, Hymenoptera, Hemiptera, Coleoptera, Diptera, Thysanoptera, Orthoptera and venomous species. Homoptera insects in the number of possession of the absolute advantage, up 67.96%. The highest abundance of Hymenoptera is 59 species. The dominant species (> 10%) are leafhoppers, and the common species (1% -10%) include Apis cerana cerana, Araceae, ants, Lygus and so on. There were 59 species and 1610 herbivores in the surveyed insect community. The abundance and number of individuals possessed the absolute advantage in the community. In particular, the most entrained insects, the largest number of individuals and dominance index, but the lowest degree of uniformity. Parasitic natural enemies insects in the community diversity, the lowest degree of dominance, mostly Hymenoptera species. Neutral insect dominance index higher. Predatory insects species abundance and the number of individuals smaller, but the diversity of high, second only to parasitic insects.